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Switching Regulator - Switching Regulators 
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MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 24 |
| VOUT1 (V) (min) | 1.25 |
| VOUT1 (V) (max) | 24 |
| IOUT1 (A) (max) | 0.6 |
| Switch Type | Internal |
| Preset VOUT (V) | 5 |
| Output Adjust. Method | Preset Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 200 |
| Package/Pins | UMAX/8 |
| Budgetary Price (See Notes) | 4.38 |
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Simplified Block Diagram
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Parameters
Parametric specs for Step-Down Switching Regulators
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 24 |
| VOUT1 (V) (min) | 1.25 |
| VOUT1 (V) (max) | 24 |
| IOUT1 (A) (max) | 0.6 |
| Switch Type | Internal |
| Preset VOUT (V) | 5 |
| Output Adjust. Method | Preset Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 200 |
| Package/Pins | UMAX/8 |
| Budgetary Price (See Notes) | 4.38 |
Key Features
- Fixed 5V or Adjustable Output
- 4.5V to 24V Input Voltage Range
- Up to 600mA Output Current
- Internal 0.4Ω P-Channel MOSFET
- Efficiency Over 95%
- 15µA Quiescent Supply Current
- 3µA Shutdown Current
- 100% Maximum Duty Cycle for Low Dropout
- Current-Limited Architecture
- Thermal Shutdown
- Small 8-µMAX Package
Applications/Uses
- Distributed Power Systems
- Handheld Devices
- Keep-Alive Supplies
- Notebook Computers
Description
The MAX1776 high-efficiency step-down converter provides an adjustable output voltage from 1.25V to VIN from supply voltages as high as 24V. An internal current-limited 0.4Ω MOSFET delivers load currents up to 600mA. Operation to 100% duty cycle minimizes dropout voltage (240mV at 600mA).
The MAX1776 has a low 15µA quiescent current to improve light-load efficiency and conserve battery life. The device draws only 3µA while in shutdown.
High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. The MAX1776 is available in an 8-pin µMAX package, which uses half the space of an 8-pin SO. For increased output drive capability, use the MAX1626/ MAX1627 step-down controllers, which drive an external P-channel MOSFET to deliver up to 20W.
The MAX1776 has a low 15µA quiescent current to improve light-load efficiency and conserve battery life. The device draws only 3µA while in shutdown.
High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. The MAX1776 is available in an 8-pin µMAX package, which uses half the space of an 8-pin SO. For increased output drive capability, use the MAX1626/ MAX1627 step-down controllers, which drive an external P-channel MOSFET to deliver up to 20W.
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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